Combined transmitter and receiver for acoustical and optical alerting



FIG. 1 is a perspective view of a combined transmitter and receiver for acoustical and optical alerting showing my new design;

FIG. 2 is an enlarged left, as viewed from the front side, elevational view of the transmitter thereof;

FIG. 3 is a front elevational view of the transmitter;

FIG. 4 is a top plan view of the transmitter;

FIG. 5 is a rear elevational view of the transmitter;

FIG. 6 is a right, as viewed from the front side, elevational view of the transmitter;

FIG. 7 is a bottom plan view of the transmitter;

FIG. 8 is an enlarged front elevational view of the receiver thereof;

FIG. 9 is a top plan view of the receiver;

FIG. 10 is a rear elevational view of the receiver;

FIG. 11 is a bottom plan view of the receiver;

FIG. 12 is a left, as viewed from the front, side elevational view of the receiver; and,

FIG. 13 is a right, as viewed from the front side, elevational view of the receiver. 

The ornamental design for a combined transmitter and receiver for acoustical and optical alerting, as shown and described. 